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. 2016 Dec 18;95(3):262–269. doi: 10.1111/aos.13337

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© 2016 The Authors. Acta Ophthalmologica published by John Wiley & Sons Ltd on behalf of Acta Ophthalmologica Scandinavica Foundation.

This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.

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Optical coherence tomography (OCT) scan and the nine sectors of the ETDRS grid. (A) The nine sectors of the ETDRS grid (right eye). Fovea (sector 1), pericentral ring (sectors 2–5) and peripheral ring (sectors 6–9). (B) Representative horizontal spectral domain Cirrus HD‐OCT (Carl Zeiss Meditec) scan through the fovea from the right eye of a healthy subject.